* {
  box-sizing: border-box;
}

:root {
  color-scheme: light dark;
  --light: #fff;
  --lesslight: #efefef;
  --dark: #404040;
  --moredark: #000;
  --link: royalblue;
  line-height: 1.5em;
  font-family: system-ui, sans-serif;
  font-size: 1em;
  color: var(--dark);
}

h1 {
  line-height: 1em;
}

button,
input,
textarea {
  font-size: 1em; /* Override browser default font shrinking*/
}

input {
  border: 1px solid var(--dark);
  background-color: var(--lesslight);
  border-radius: 0.25em;
  padding: 0.5em;
}

pre {
  background-color: var(--lesslight);
  margin: 0.5em 0 0.5em 0;
  padding: 0.5em;
  overflow: auto;
}

code {
  background-color: var(--lesslight);
}

blockquote {
  border-left: 0.25rem solid var(--dark);
  padding-left: 1rem;
}

body {
  background-color: var(--light);
  margin: 0;
  max-width: 800px;
  padding: 0 20px 20px 20px;
  margin-left: auto;
  margin-right: auto;
}

a {
  outline: none;
  color: var(--dark);
}

a:hover {
  text-decoration-color: var(--link);
}

img {
  max-width: 100%;
  height: auto;
}

button,
.button,
input[type="submit"] {
  display: inline-block;
  background-color: var(--dark);
  color: var(--light);
  text-align: center;
  padding: 0.5em;
  border-radius: 0.25em;
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.button a {
  text-decoration: none;
}

button:hover,
.button:hover,
input[type="submit"]:hover {
  color: var(--lesslight);
  background-color: var(--moredark);
}

/* Add a margin between side-by-side buttons */
button + button,
.button + .button,
input[type="submit"] + input[type="submit"] {
  margin-left: 1em;
}

.center {
  display: block;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.breathe {
  margin-top: 3em;
}

input.center {
  display: block;
  margin-top: 1em;
}

.bordered {
  border: 3px solid;
}

.home,
.menu {
  display: inline-block;
  background-color: var(--dark);
  color: var(--light);
  margin-top: 20px;
  padding: 5px 10px 5px 10px;
  text-decoration: none;
  font-weight: bold;
  border-radius: 0.25em;
}

.header {
  margin-top: 1em;
}

.menu {
  display: block;
  width: fit-content;
  margin-inline-start: auto;
}

.title {
  font-weight: bold;
  font-size: 2em;
}

.subtitle {
  font-weight: bold;
}

/* Desktop sizes */
@media (min-width: 600px) {
  ol.twocol {
    column-count: 2;
  }

  .row {
    display: flex;
    flex-direction: row;
    padding: 0;
    width: 100%;
  }

  /* Make everything in a row a column */
  .row > * {
    display: block;
    flex: 1 1 auto;
    max-width: 100%;
    width: 100%;
  }

  .row > *:not(:last-child) {
    margin-right: 10px;
  }
}

/* Dark mode overrides (confusingly inverse) */
@media (prefers-color-scheme: dark) {
  :root {
    --light: #222;
    --lesslight: #333;
    --dark: #eee;
    --moredark: #fefefe;
  }
  /* This fixes an odd blue then white shadow on FF in dark mode */
  *:focus {
    outline: var(--light);
    box-shadow: 0 0 0 0.25em var(--link);
  }
  .button a {
    color: var(--light);
  }
}

/* Printing */
@media print {
  .home {
    display: none;
  }
}